15. An equivalent trigonometric expression for sin d. sin x b. tan x π X is C. COS X d. none of the above 16. An equivalent trigonometric expression for cos(-x) is e. sin x b. - sin x C. COS X d. -COS X

Trigonometry (MindTap Course List)
10th Edition
ISBN:9781337278461
Author:Ron Larson
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Chapter2: Analytic Trigonometry
Section2.1: Using Fundamental Identities
Problem 4ECP
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pls help asap on both pls.

15. An equivalent trigonometric expression for sin
d.
sin x
b.
tan x
π
X is
C.
COS X
d.
none of the above
16. An equivalent trigonometric expression for cos(-x) is
e.
sin x
b.
- sin x
C.
COS X
d.
-COS X
Transcribed Image Text:15. An equivalent trigonometric expression for sin d. sin x b. tan x π X is C. COS X d. none of the above 16. An equivalent trigonometric expression for cos(-x) is e. sin x b. - sin x C. COS X d. -COS X
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